HIOKI FT6381 ENG (PDF)

CLAMP ON EARTH TESTER FT6380,FT6381
Field Measuring Instruments

Easy pole earth resistance measurement
with super slim jaw
High Accuracy

Easy Open Jaw
Light Weight

For multi grounded systems only

0.02 Ω to 1600 Ω wide measurement range for earth resistance measurement
1.00 mA to 60.0 A covering small leakage current to load current
CAT Ⅳ 600 V

FT6381

Data transfer to AndroidTM phones using Bluetooth® wireless technology.*

Real time data transfer, automatic report generation on AndroidTM phone.

* Please download and install the "FT6381 Communication Software" from the Google

PlayTM store in order to use the wireless connection function with an AndroidTM phone.
The software is free, but the user is responsible for any Internet connection costs incurred
in the course of downloading or using the application.

2

Get Things Done with Super Slim Jaws
Easy clamping!

Clamp at the narrowest point!

Open jaws easily with just two fingers.
Only half the grip power is needed compared to
typical clamp earth testers.

Now you can easily clamp the earth cable on the pole
without digging. The dramatically slim 0.79 inch (20mm)
jaws let you finish your job easily and efficiently.

0.87 inch
(22 mm)

▼

1.26 inch
(32 mm)

0.79 inch

(20 mm)

High Accuracy and Repeatability
Well-designed magnetic shields eliminate
the leakage flux between the two cores that
often affect measurement accuracy.

LCD with beautiful back light
With the bright back light, you can easily
read the measurement value even in dark
locations.

Quick Start!
No wait time after powering on.
Start measuring instantly without zerocalibration.

Alarm Function
Set the alarm to audibly and visually notify
yourself that the resistance or current value
exceeds the threshold.

Applications
Hazardous Storage Tanks

Large storage capacity

(up to 2,000 data)

You can store up to 2,000 measurement
values in the field and recall them in your
office later.

Memory number

* The illustration may differ slightly from the field application.

Transmission Towers

3

Automatic Report Generation

For the U.S./ Canada/ Europe/ Singapore/ Mexico
Japan/ Vietnam/ thailand/ Indonesia only

Model FT6381 can create reports instantly in the field using an AndroidTM phone via a Bluetooth® wireless technology.

Single Point Report

1

Real time data transfer

2

Automatic Report Generation on your AndroidTM phone
Report includes the Measurement Value, Date and
Time, Map with GPS information and Pass/Fail
information

Field

3

Download data

Office

Via e-mail
After making a report, you can see it on the
AndroidTM phone or send the data to your PC at
the office via e-mail.

Summary Report
Store multiple
measurement values

1

2

Select all the data for
the report

3

Instant summary report generation from
multiple data

Stored Data

1st

2 nd
3 rd

Measurement Principle

FT6380/6381 can measure Multi-Grounded systems.

Voltage Injection
Current Measurement

Rx
R1
R2
R3
R4
Clamp on the earth cable. The instrument has two cores for voltage injection and current measurement.
1. The voltage transducer injects a defined voltage into the
multi-grounded system.
2. From the defined voltage and measured current, the total
circuit loop resistance is calculated in the following equation.
1
V
Rx +
=
1
1
1
1 ...
I
+
+
+
R1
R2 R3 R4

Measurement Examples

Actual measured value

Actual measured value

Actual measured value

In a typical multi-grounded system, the parallel
resistance value is small enough to be ignored and
the equation as referred on the left can be simulated
as follows.
Rx =

V
I

In multi-grounded system, the larger the number of grounding
poles, the more accurate the measured value. Where the
number of grounding poles are few, if just only one carries a very
small resistance (e.g., 1Ω), the measured value will be close to
the true value. On the other hand, poles with large resistances
(e.g., 100Ω) will result in greater measurement uncertainties.

Specifications

Current measurement specifications

Digital/ LCD, max. 2000 digits
Display update rate: 2 times / s
Display
Auto-range
Range switching
Maximum conductor diameter for measurement ø 32 mm (1.26 in)
LR6 alkaline battery × 2
Power supply
Continuous operating time: Approx. 35 hours With display backlight off, Bluetooth OFF (FT6381)
Power save state when 5 minutes have elapsed since the last operation
Auto power save
-10°C (14°F) to 50°C (122°F), 80 % rh or less (non-condensation)
Operating temperature and humidity
-20°C (-4°F) to 60°C (140°F), 80 % rh or less (non-condensation, except for the battery)
Storage temperature and humidity
IP40 (EN60529) With Jaws Closed
Dustproof and waterproof
600 VAC measurement category IV (anticipated transient overvoltage 8000 V)
Maximum rated voltage to earth
Between the Case and the Clamp core 7400 Vrms 1 minute
Dielectric strength
100 A AC continuous, 200 A AC for 2 minutes (50/60 Hz)
Maximum input current
Within ±0.5% rdg. (using the center of the sensor as the reference, in all positions)
Conductor position effects
10 mA or less in an external magnetic field of 400 A/m at 50/60 Hz AC
Magnetic field interference
Safety: EN61010, EMC: EN61326,
Wireless (For FT6381 only): FCC Part 15.247/ IC RSS-210/ EN 300 328, 301 489-1, 301-489Applicable standards
17/ Singapore DA106438/ Mexico (COFETEL) RCPHIWT13-0616/ Vietnam wireless standards not
covered(60mWeirp or less)/ thailand (SDoC) module recognize/ Indonesia (SDPPI) 33081/ SDPPI/ 2014
Approx. 73 mm (2.87 in) W × 218 mm (8.58 in) H × 43 mm (1.69) D , Approx 620 g (21.9 oz)
Dimensions, Mass
Carrying Case×1, Resistance Check Loop×1, Strap×1, Instruction Manual×1, Alkaline Battery(LR6)×2
Accessories

FT6381

Alarm function

Interface

Interface
Communication Distance
Communication Protocol
Compatibility
Applicable OS

Bluetooth® v2.1+EDR
10 m (Class 2.1)
SPP (Serial Port Profile)
Smartphone/ Tablet (AndroidTM)
AndroidTM 2.1 or later

The application supports Android OS 2.1 or later, but proper operation is not
guaranteed on all Android. handsets. For more information about the devices on
which proper operation has been confirmed, see Hioki’s website.

Resistance mode
Range
0.20 W
2.00 W
20.00 W
50.0 W
100.0 W
200.0 W
400 W
600 W
1200 W
1600 W

Current Mode
Range

Alarm Hi/Lo

Alarm threshold
setting range

(Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Measurement Range
Resolution
Accuracy
0.02 W to 0.20 W
0.01 W
±1.5 % rdg. ±0.02 W
0.18 W to 2.00 W
0.01 W
±1.5 % rdg. ±0.02 W
1.80 W to 20.00 W
0.01 W
±1.5 % rdg. ±0.05 W
18.0 W to 50.0 W
0.1 W
±1.5 % rdg. ±0.1 W
50.0 W to 100.0 W
0.1 W
±1.5 % rdg. ±0.5 W
100.0 W to 200.0 W
0.2 W
±3.0 % rdg. ±1.0 W
180 W to 400 W
1W
±5 % rdg. ±5 W
400 W to 600 W
2W
±10 % rdg. ±10 W
600 W to 1200 W
10 W
±20 % rdg.
1200 W to 1600 W
20 W
±35 % rdg.
Frequency of measurement Approx. 2,400Hz.
(Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)
Measurement Range

Resolution

20.00 mA

1.00 mA to 20.00 mA

0.01 mA

200.0 mA

18.0 mA to 200.0 mA

0.1 mA

2.000 A

0.180 A to 2.000 A

0.001 A

20.00 A

1.80 A to 20.00 A

0.01 A

60.0 A

18.0 A to 60.0 A

0.1 A

Frequency Range
45 ≤ f ≤ 66Hz
30 ≤ f < 45Hz, 66 < f ≤ 400Hz
45 ≤ f ≤ 66Hz
30 ≤ f < 45Hz, 66 < f ≤ 400Hz
45 ≤ f ≤ 66Hz
30 ≤ f < 45Hz, 66 < f ≤ 400Hz
45 ≤ f ≤ 66Hz
30 ≤ f < 45Hz, 66 < f ≤ 400Hz
45 ≤ f ≤ 66Hz
30 ≤ f < 45Hz, 66 < f ≤ 400Hz

Registered Trademarks

Separate Hi/Lo settings for resistance measurement
and current measurement
Resistance measurement: Hi.AL/Lo.AL
Current measurement: Hi.AL/Lo.AL
Resistance measurement: 0.02 Ω to 1,600 Ω
Resistance measurement initial value: 25.0 Ω
Current measurement: 0.05 mA to 200.0 mA,
0.201 A to 60.0 A
Current measurement initial value: 1.00 mA

Accessories
Carrying Case

Resistance Check Loop

Accuracy
Filter off
Filter on
±2.0 % rdg. ±0.05 mA
±2.0 % rdg. ±0.05 mA
±2.5 % rdg. ±0.05m A
—
±2.0 % rdg. ±0.5 mA
±2.0 % rdg. ±0.5 mA
±2.5 % rdg. ±0.5m A
—
±2.0 % rdg. ±0.005 A
±2.0 % rdg. ±0.005 A
±2.5 % rdg. ±0.005 A
—
±2.0 % rdg. ±0.05 A
±2.0 % rdg. ±0.05 A
±2.5 % rdg. ±0.05 A
—
±2.0 % rdg. ±0.5 A
±2.0 % rdg. ±0.5 A
±2.5 % rdg. ±0.5 A
—

· Bluetooth® is a trademark of Bluetooth SIG, Inc. and licensed for use by HIOKI E.E. CORPORATION.
· Android™ Google Play™ is a registered trademarks of Google, Inc.

Note: Company names and Product names appearing in this catalog are trademarks or registered trademarks of various companies.

HIOKI (Shanghai) SALES & TRADING CO., LTD.
TEL +86-21-63910090 FAX +86-21-63910360
http://www.hioki.cn / E-mail: info@hioki.com.cn

РАДАР - ОФИЦИАЛЬНЫЙ ДИЛЕР HIOKI

HIOKI INDIA PRIVATE LIMITED
TEL +91-124-6590210

HEADQUARTERS
E-mail: hioki@hioki.in
81 Koizumi, Ueda, Nagano, 386-1192, Japan
TEL +81-268-28-0562 FAX +81-268-28-0568
HIOKI SINGAPORE PTE. LTD.
http://www.hioki.com / E-mail: os-com@hioki.co.jp TEL +65-6634-7677 FAX +65-6634-7477
E-mail: info-sg@hioki.com.sg

HIOKI USA CORPORATION
HIOKI KOREA CO., LTD.
TEL +1-609-409-9109 FAX +1-609-409-9108
TEL +82-2-2183-8847 FAX +82-2-2183-3360
http://www.hiokiusa.com / E-mail: hioki@hiokiusa.com E-mail: info-kr@hioki.co.jp
All information correct as of Sept. 25, 2015. All specifications are subject to change without notice.

РОССИЯ, 198152, Санкт-Петербург
Краснопутиловская ул., д.25
Тел./факс +7 (812) 600-48-89
Тел.: +7 (812) 375-32-44
www.radar1.ru
FT6380E7-59E
Printed in Japan
info@radar1.ru